Morphological Analysis of technologies using multidimensional scaling

This study focuses on the application of Morphological Analysis to making technology analyses. In this study, Morphological Analysis is used as a framework for applying expert opinion, bibliometrics, text mining and multidimensional scaling to problem- structuring. We describe the method used as well as its application and apply it to a case of portable fuel cell technology. The results demonstrate the practicality of using Morphological Analysis in structuring complex problems and offer an example of its application in assessing the status of a technology.<br

Analyzing the Direct Methanol Fuel Cell technology in portable applications by a historical and bibliometric analysis

The development of direct methanol fuel cell (DMFC) technology through an analysis of research, patenting and commercial adoption is studied in this paper. The analysis uses a dataset gathered from both publication and patent databases. This data is complemented with a review on commercial efforts on portable fuel cells. Bibliometric methods are used to identify research networks and research trends. The Fisher-Pry growth model is used to estimate future research activity. The patent landscape is also analyzed by exploring patenting activity. The bibliometric and patent database analysis results were then reflected against a review on commercial adoption. The research indicated increased research activity from the early 90's and expectations of significant growth in the future. Strong emphasis is seen in Asian organizations producing research results and gathering Immaterial Property Rights. However the early expectations on rapid commercialization of the technology have not been met. The commercially viable application of the technology is still lacking

Gas sensor using anodic Tio2 thin film for monitoring hydrogen

AbstractWe report a gas sensor using an anodic TiO2 thin films that were synthesized on Si wafer with Pt electrodes on top. The anodic TiO2 films were prepared through an anodic oxidation in fluoride-ion-containing electrolytes. The obtained material was annealed at 450°C for crystallization. Two Pt electrodes were formed on TiO2 film. The electrical behavior during anodization was measured. The material properties of TiO2 film were studied using a scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Gas response measurements to hydrogen (10, 100, 1000ppm) were carried out by varying operation temperatures ranging from 30 - 200°C in Ar buffers. The sensor showed a prominent response towards H2 at 200°C

Clustering scientific documents with topic modeling

Topic modeling is a type of statistical model for discovering the latent "topics" that occur in a collection of documents through machine learning. Currently, latent Dirichlet allocation (LDA) is a popular and common modeling approach. In this paper, we investigate methods, including LDA and its extensions, for separating a set of scientific publications into several clusters. To evaluate the results, we generate a collection of documents that contain academic papers from several different fields and see whether papers in the same field will be clustered together. We explore potential scientometric applications of such text analysis capabilitie

A bibliometric analysis of the development of next generation active nanotechnologies

Delineating the emergence of nanotechnologies that offer new functionalities is an important element in an anticipatory approach to the governance of nanotechnology and its potential impacts. This paper examines the transition to next generation active nanotechnologies which incorporate functions that respond to the environment or systems concepts that combine devices and structures that are dynamic and which may change their states in use. We develop an approach to identifying these active nanotechnologies and then use bibliometric analysis to examine the extent of research papers and patents involving these concepts. We also examine references to environmental, health, and safety concepts in these papers, given that these next generation nanotechnologies are likely to have risk profiles that are different from those of first-generation passive nanomaterials. Our results show a steady growth overall in focus on active nanotechnologies in the research literature and in patents over the study period of 1990–2010. We also find an increase in consideration given to environmental, health, and safety topics. While gaps are highlighted in our understanding of research and innovation in active nanotechnologies, the results suggest that there is beginning to be a shift to active nanotechnologies, with the implication that governance processes need to be conscious of this shift and to prepare for it.</p